<!DOCTYPE html>
<html>
<head>
<meta charset="EUC-KR">
<title>Insert title here</title>

<style type="text/css">
	
	.container{ border: 1px solid silver; }
	.container div{ width: 100px; height: 100px; }
	.red{ background: red; }
	.blue{ background: blue; }
	.green{ background: green; }
	.gray{ background: gray; }
	
	.float_left_container div{ float: left; }
	
</style>
</head>
<body>
	
	<div class="container float_right_container">
		<div class="red"></div>
		<div class="green"></div>
		<div class="blue"></div>
		<div class="gray"></div>
	</div>
</body>
</html>